SOLID PARTS OF ANIMALS. 



Cartilage, . 31-05 



Subsesquiphosphate of lime, 46-34 

 Carbonate of lime, . 6-32 

 Magnesia, . 2-81 



Common salt, . 4-21 



Water, . 10-86 



101-59 



It therefore resembles ivory in its composition as it does in its 

 specific gravity. The excess observable in some of the preced- 

 ing analyses may have been partly owing to the chlorides of po- 

 tassium and sodium not existing as such in the teeth but only 

 their bases. The analysis threw no light upon this. And I was 

 unable to extract either an alkali or a chloride from the teeth by 

 simply boiling them in water. 



Berzelius analyzed the enamel and ivory of different teeth.* 

 The result was as follows : 



Human. Ox. 



Subsesquiphosphate of lime, 88*5 85-0 



Carbonate of lime, . . 8-0 7*1 



Phosphate of magnesia, 1-5 3-0 



Soda, . . ... 1.4 



Brown membranes, alkali water, 2-0 3*5 



100-0 100-0 



His analysis of the ivory of teeth gave the following result : 



Human. Ox, 



Cartilage and yessels, . 28-0 21-000 



Subsesquiphosphate of lime, 64-3 63-15 



Carbonate of lime, . 5-3 1-38 



Phosphate of magnesia, . 1-0 2-07 



Soda with some common salt, 1*4 2-40 



100-0 100-00 



Lassaignef published the result of his analysis of the teeth of 

 various animals a good many years ago. He did not separate 



the enamel from the ivory ; but appears to have subjected the 







* Traite de Chimie, vii. 479 ; or Afhandlingar, i. 222. 

 f Jour, de Pharmacie, vii. 1. 



